diff --git a/Cargo.lock b/Cargo.lock
index 6efffd62e..cff90ec6a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7938,8 +7938,7 @@ dependencies = [
 [[package]]
 name = "ssz_types"
 version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e43767964a80b2fdeda7a79a57a2b6cbca966688d5b81da8fe91140a94f552a1"
+source = "git+https://github.com/sigp/ssz_types?rev=63a80d04286c8561d5c211230a21bf1299d66059#63a80d04286c8561d5c211230a21bf1299d66059"
 dependencies = [
  "arbitrary",
  "derivative",